PHL - IDA

$210 Find Cheap Flights from Philadelphia to Idaho Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Idaho Falls departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$408
Overall average: $645
Alaska Airlines
Wed 12/10Sat 12/13
PHL - IDA • 1 stop
Cheapest one-way
$210
American Airlines
Mon 12/15
PHL - IDA • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $408 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 35% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Idaho Falls (PHL-IDA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Idaho Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Idaho Falls

Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
7:06 am - 4:27 pmPHL-IDA
11h 21m1 stop
Alaska Airlines Logo
5:07 pm - 5:46 amIDA-PHL
10h 39m1 stop
$408Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
7:00 am - 12:31 pmPHL-IDA
7h 31m1 stop
Delta Logo
6:45 pm - 5:39 amIDA-PHL
8h 54m1 stop
$409Delta
Find Deal
Wed, Dec 10 - Sun, Dec 14
Alaska Airlines Logo
7:06 am - 4:27 pmPHL-IDA
11h 21m1 stop
Alaska Airlines Logo
5:07 pm - 5:46 amIDA-PHL
10h 39m1 stop
$413Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
1:00 pm - 10:21 pmPHL-IDA
11h 21m2 stops
Delta Logo
6:45 pm - 5:39 amIDA-PHL
8h 54m1 stop
$414Delta
Find Deal
Thu, Dec 11 - Mon, Dec 15
Alaska Airlines Logo
7:06 am - 4:27 pmPHL-IDA
11h 21m1 stop
Alaska Airlines Logo
6:05 am - 5:53 pmIDA-PHL
9h 48m1 stop
$418Alaska Airlines
Find Deal
Tue, Jan 6 - Sat, Jan 10
American Airlines Logo
12:08 pm - 10:36 pmPHL-IDA
12h 28m2 stops
American Airlines Logo
7:20 am - 9:18 pmIDA-PHL
11h 58m2 stops
$419American Airlines
Find Deal
Sat, Dec 13 - Sat, Dec 13
Delta Logo
7:05 am - 12:37 pmPHL-IDA
7h 32m1 stop
Delta Logo
7:06 pm - 9:27 amIDA-PHL
12h 21m2 stops
$469Delta
Find Deal
Sat, Dec 13 - Mon, Dec 15
Delta Logo
7:05 am - 12:37 pmPHL-IDA
7h 32m1 stop
Delta Logo
7:06 pm - 9:27 amIDA-PHL
12h 21m2 stops
$474Delta
Find Deal
Wed, Jan 7 - Sat, Jan 10
American Airlines Logo
4:00 pm - 10:36 pmPHL-IDA
8h 36m1 stop
American Airlines Logo
7:20 am - 5:42 pmIDA-PHL
8h 22m1 stop
$498American Airlines
Find Deal
Wed, Jan 7 - Sat, Jan 10
United Airlines Logo
6:30 am - 1:30 pmPHL-IDA
9h 00m2 stops
United Airlines Logo
2:40 pm - 11:30 pmIDA-PHL
6h 50m1 stop
$504United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Philadelphia to Idaho Falls flights

Get data-powered insights and trends into flights from Philadelphia to Idaho Falls to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to Idaho Falls?

The average price of all round-trip flights from Philadelphia to Idaho Falls clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Idaho Falls on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Philadelphia to Idaho Falls. For your return ticket, we recommend flying on a Friday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from Philadelphia to Idaho Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Idaho Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Idaho Falls is February, where tickets cost $447 (return) on average. On the other hand, the most expensive months are January and May, where the average cost of round-trip tickets is $1,005 and $992 respectively.

Good to know

Low seasonMarch
Cheapest flight$210
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 28% lower on average.
Flight from Philadelphia to Idaho Falls

When to book flights from Philadelphia to Idaho Falls

Are your dates flexible? Find out the best times to travel from Philadelphia to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Idaho Falls

  • What is the cheapest flight from Philadelphia to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Philadelphia to Idaho Falls was $210 for a one-way ticket and $408 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Idaho Falls?

    A passport is not required to fly from Philadelphia to Idaho Falls.

  • Which aircraft models fly most regularly from Philadelphia to Idaho Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Idaho Falls?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Philadelphia and Idaho Falls, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Philadelphia to Idaho Falls, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Idaho Falls are Delta and United Airlines. With an average price for the route of $527 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $704 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Philadelphia to Idaho Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Idaho Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Idaho Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Idaho Falls with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Idaho Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Idaho Falls from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Philadelphia to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Idaho Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Idaho Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8008 reviews
7.9Comfort
7.9Entertainment
7.3Food
8.1Boarding
8.5Crew
Airline reviews

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

8.0 ExcellentAnonymous, Nov 2025SFO - MSP
Read more Delta reviews

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Other than a way way too cold cabinets for the entire flight, all was great

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

Everything you need to know for your flight from Philadelphia to Idaho Falls

Information on your arrival and departure airports